
Sonoff Extreme Wi-Fi Smart Switch 10A / MiniR4
The SONOFF MINIR4 is a small Wi-Fi smart switch module that installs behind an existing wall switch or inside a mounting box, and turns the connected light or appliance into one you can control from your phone. It works on 100-240 V AC, switches loads up to 10 A, and connects to 2.4 GHz Wi-Fi.



Compact module: The MINIR4 measures 39.5 × 33 × 16.8 mm, so it fits inside wall boxes behind a normal switch. You keep using your existing switch and gain app and voice control at the same time.
ESP32 chip: The module is built on the ESP32 chip. It handles the Wi-Fi connection and the switching commands from the app.
Works with many external switch types: You can wire momentary (push) switches, door exit switches, SPDT switches and dry contact sensors to the MINIR4. This lets it fit different installations, not only a standard light switch.
Detach Relay mode: In this mode the external switch and the relay work separately, so pressing the wall switch does not change the relay state. The connected load can stay powered and online in the app while the wall switch is used as an input.
Voice control: The MINIR4 works with Amazon Alexa and Google Assistant, so you can turn the connected light or appliance on and off by voice.
Good to know
Maximum load is 10 A. It is wired to mains voltage (100-240 V AC). The module needs a 2.4 GHz Wi-Fi network.
Technical Specifications
| Model | MINIR4 |
| Input | 100-240 V AC, 50/60 Hz, 10 A max |
| Wi-Fi | IEEE 802.11 b/g/n, 2.4 GHz |
| Chip | ESP32 |
| Housing Material | PC V0 |
| Dimensions | 39.5 × 33 × 16.8 mm |
| Voice Assistants | Amazon Alexa, Google Assistant |
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